Fluid abradant supplying means



April 17,

A. E. MAYNARD FLUID ABRADANT SUPPLYING MEANS Fil'ed Dec. 13. 1926 I /zo I I 9 O i 30 P71 /Z4' (llberf Qmagnard Patented Apr. 17, 1928.

UNITED STATES:

ALBERT n. MAYNARD, or sou'rnnnrnen, wuxssa'cmrssrrs, assreno a TO A M RIQAN OPTICAL. GOM'PAN'IOF- SOUTHBRIDGE, MASSACHUSETTS, A VOLUNTARYASSQCIA- TION OF MASSACHUSETTS.

ILUIDI ABRADANT surrnYiue. MEANS.

. ing parts of a surfacing machine and has particular reference to supplying a, fluid abradant to the operating surfacesof, tools for surfacing Ophthalmic lenses.

The principal object of the invention is to provide fluid abradant supplying means by which the direction at which the abradant is supplied to the tool may be regulated and also by which the amount of abradant so supplied can beregulated.

Another objectofthe invention is to provide simple, inexpensive and efficient means for directingthe direction of the fluid abraldant as well asregulating the amount of abradant supplied; I I c Other objects and advantages of the invention will becomeapparent from the fol-. lowing description taken in connection with the accompanyingdrawings and it will be understood that many modifications and changes in the details of construction and arrangement of parts may be made without departing from the spirit of the invention as expressed in the accompanying claims. I, therefore, do not wish to be limited to the exact details shown and described, the preferred forms only having been shown by way of illustration.

Referring to the drawings,

Figure 1 is a partial longitudinal cross section showing the application of the invention to a surfacing machine;

Figure 2 is a partial longitudinal cross section through the abradant supplying means showing the means of directing the source of supply as well as regulating the amount of supply;

Figure 3 is a top plan-view of Figurel.

Referring to the drawings in which simi lar characters of reference denote slmilar parts throughout, the work 1, which in the present instance is an ophthalmic lens, is

' mounted for rotation over the surfacing tool 2. The surfacing tool 2 is carried by the spindle 3 which is rotated by the pulley 4 and the belt 5. The work 1 is rotated or carried over the tool 2 by means of the spindle 6 rotated by the pulley 7 and the belt 8. An ofl'set crank arm or pin 9 is carried by the spindle 6. This crank arm has a locating pin 10 which fits into a loose bearing recess 11 in the work' holder 12 which is secured to the work 1, by ace-V ment or pitch layer 13. The crank 9 being offset from the spindle 6 will tend to carry the work 1 around a circular path on the tool 2, the center ofthe circle being the axis ofthe spindle 6. The pin 10 fitting loosely into the recess 11 allows the work 1 to adjust itself to the surfaceof the tool 2. Surrounding thetool 2 is a pan or bowl 14: which is secured'to the shaft 3 and rotates therewith. In this bowl 14 is a supply of fluid abradant 15, that is, an abradant suchIas rouge or 1 emery carried i-n'water; The bowl 14' being rotated by thespind'le 3 carries the liquid 'abradanta round with itand has a tendency to throw it up at the sides due to centrifugal force. I In the path of the abradant 15 which is being thrown up at the sides as described is placeda scoop member 16 which is supported by a rod 17 carried by'the bracket rod 18 and bracket 19. The bracket rod 18 maybe moved up and "down in the bracket 19 in the'bearings 20 and locked in position bythe set screw 21; The rod 17 may be moved back and forthin its bearings in the rod 18 at the point 22 'an'd'locked in position by the .set screw 21. .The' rod 17 may be be rotated by turning the rod 18 in its bearings 20"as a center. -These adjustments of the rod 17 permit the scoop apron 24 to be positioned in the path of the moving abradant 15. There is a central opening or channel25 in the member 16through which I the abradant 15 is forced by the movement of the bowl 1 1. Toregulate the amount of abradant that is' allowed to pass through the channel 25 in the member 16 there is a spigot or cock 26 located in the member 16 so that by turning the same the amount of abradant passing through the channel beyond the spigot 26 will be regulated. To determine the-direction at which the flowing abradant will be delivered from the channel 25 there is supplied'at the end of the member 16 a revolvabl'e turn button 27 having a central opening or channel 28 in line with the channel 25 and an offset open. ing or spout 29 communicating with the channel 28. The fluid abrasive is emitted fromthe spout 29' onto the tool 2. To regulate the direction in which the fluid abrasive will be delivered from the spout 29 the turn button 27 maybe turned in its bearings 30 in the member 16 to position the opening T or orifice 29 as desired and the turn button may be locked in said position by means of the set screw 31. I

It will, therefore, be seen that the direction at which the fluid abrasive is delivered to the tool may be regulated by turning the turn button 27 and. the amount of the abrasive may be-regulated by turning the spigot 26 and the member 16 may be positioned in the path of: the flowing abradant 15 by the proper adjustment oi? the rod 17 as has been hitherto described.

From the foregoing description it will be seen that I have provided simple, inexpensive and efiicient means for carrying out the objects of this invention and particularly for regulating the direction of the supply of abradant and the amount thereof. 7

Having described my invention, I claim:

1. In combination with a rotatable bowl containing a fluid abrasive, an abrasive scoop member comprising a pipe portion having an internal channel, a scoop apron at one end and an internal annular shoulder at the other end, a nozzle member having an annular barrel portion fitting the internal shoulder of the pipe member and having an external projecting portion and a transverse recessed groove on the barrel portion, a member projecting through the pipe portion into the recessed groove on the barrel portion whereby the barrel portion may be turned within the annular shoulder portion without separation of the parts, said nozzle member having a central channel portion aligning with the channel portion of the pipe member and an ofiset channel portion intersecting the first channel portion and opening through the extending portion of the nozzle member, and means to support the abrasive scoop member within the bowl in operative related position with the Walls of the bowl. v

2. In combination with a rotatable bowl containing av fluid abrasive, an abrasive scoop member comprising a pipe portion having an internal channel, a scoop apron at one end and in internalannular shoulder at the other end, a nozzle member having an annular barrel portion fitting the internal shoulder of the pipe member and having an i external projecting portion and a transverse recessed groove on the barrel port on, screw 7 means projecting through the pipe portion into the recessed groove on the barrel portion whereby the barrel portion may be turned within the annular shoulder portion without separation of the parts, said nozzle member having a central channelportion aligning with the channel portion of the pipe member'and an offset channel portion intersecting the first channel portion and opening through the extending portion of the nozzle member, means to support the abrasive scoop member within'the bowl in operative related position with the walls of the bowl, and means intermediate the ends of the scoop member for regulating the amount of abrasive passing through the internal channel thereof.

ALBERT MAYNARD. V 

